periarteriolar lymphoid sheath

periarteriolar lymphoid sheath

(pĕr″ē-ahr-tĭr′ē-ō′lĕr),

PALS

A region of the spleen that encircles the splenic arteries and is composed mostly of T cells. It comprises the tissues sometimes referred to as the white pulp of the organ.
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Three subcompartments of white pulp, the periarteriolar lymphoid sheath (PALS), the follicles (F), and the marginal zone, are indicated by black arrow in the tissue section (Figure 3(a)).

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